<template>
  <div 
    :class="className" 
    :style="{height:height,width:width}"/>
</template>

<script>
import echarts from 'echarts';
require('echarts/theme/macarons'); // echarts theme
import { debounce } from '@/utils';

const animationDuration = 3000;

export default {
    props: {
        className: {
            type: String,
            default: 'chart'
        },
        width: {
            type: String,
            default: '100%'
        },
        height: {
            type: String,
            default: '300px'
        }
    },
    data() {
        return {
            chart: null
        };
    },
    mounted() {
        this.initChart();
        this.__resizeHandler = debounce(() => {
            if (this.chart) {
                this.chart.resize();
            }
        }, 100);
        window.addEventListener('resize', this.__resizeHandler);
    },
    beforeDestroy() {
        if (!this.chart) {
            return;
        }
        window.removeEventListener('resize', this.__resizeHandler);
        this.chart.dispose();
        this.chart = null;
    },
    methods: {
        initChart() {
            this.chart = echarts.init(this.$el, 'macarons');

            this.chart.setOption({
                tooltip: {
                    trigger: 'axis',
                    axisPointer: { // 坐标轴指示器，坐标轴触发有效
                        type: 'shadow' // 默认为直线，可选为：'line' | 'shadow'
                    }
                },
                radar: {
                    radius: '66%',
                    center: ['50%', '42%'],
                    splitNumber: 8,
                    splitArea: {
                        areaStyle: {
                            color: 'rgba(127,95,132,.3)',
                            opacity: 1,
                            shadowBlur: 45,
                            shadowColor: 'rgba(0,0,0,.5)',
                            shadowOffsetX: 0,
                            shadowOffsetY: 15
                        }
                    },
                    indicator: [
                        { name: 'Sales', max: 10000 },
                        { name: 'Administration', max: 20000 },
                        { name: 'Information Techology', max: 20000 },
                        { name: 'Customer Support', max: 20000 },
                        { name: 'Development', max: 20000 },
                        { name: 'Marketing', max: 20000 }
                    ]
                },
                legend: {
                    left: 'center',
                    bottom: '10',
                    data: ['Allocated Budget', 'Expected Spending', 'Actual Spending']
                },
                series: [{
                    type: 'radar',
                    symbolSize: 0,
                    areaStyle: {
                        normal: {
                            shadowBlur: 13,
                            shadowColor: 'rgba(0,0,0,.2)',
                            shadowOffsetX: 0,
                            shadowOffsetY: 10,
                            opacity: 1
                        }
                    },
                    data: [
                        {
                            value: [5000, 7000, 12000, 11000, 15000, 14000],
                            name: 'Allocated Budget'
                        },
                        {
                            value: [4000, 9000, 15000, 15000, 13000, 11000],
                            name: 'Expected Spending'
                        },
                        {
                            value: [5500, 11000, 12000, 15000, 12000, 12000],
                            name: 'Actual Spending'
                        }
                    ],
                    animationDuration: animationDuration
                }]
            });
        }
    }
};
</script>
